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I noticed these are recommended as being enabled on nvidia cards, however they reduce the frame rate consistency on DirectX 10+ and lower parts, im not sure about the OEM only DirectX 10.1 parts, but for the 8800-295 it drops a consistent (mostly) 30fps frame rate to 15-22fps.

Jpcsp uses OpenGl so DirectX shouldn't matter., but strange usually enabling shaders will give more fps.

I usually have good results with these options.

Use shaders (experimental)
Enable saving GE screen to Textures instead of Memory <- will give the most speedup
Enable decoding of indexed textures (using CLUT) in shader (only relevant when using shaders) <- this will cause pixel like textures though (no filtering?, but does help speed.)
Enable dynamic shader generation (only relevant when using shaders, recommended for AMD/ATI) <- can give speedup in games like 3rd birthday

The stencil & color test option will cause a slow down so i would keep them disabled unless a particular game needs them.

Yes, thats the odd thing because the G200 series was meant to have 4x the geometry shading performance over the G80 based 8x00 and 9x00


but enabling it nukes my frame rate in dissidia, crisis core and BBS.